**Table of Contents**

- Comparing Numbers
- Ascending and Descending Order
- Place Value
- Use of Commas
- Estimation
- Roman Numerals
- Summary
- Did You Know?
- What’s Next?

Knowing our numbers and the number system is an essential part of mathematics as well as of our daily lives. In this introductory segment of Knowing our numbers, we will see some interesting questions based on numbers; and to answer these questions, we will learn different concepts about numbers, in our upcoming segments.

Let us see those questions…

## How to compare numbers?

We are given two numbers: 202 & 93 Which of the two numbers is greater?

202 definitely! This was easy because 202 has a higher number of digits than that in 93. But which of the two numbers is greater between 673425 & 673452?

We can answer this question easily after learning about ‘**Comparing Numbers****’ **in the upcoming segments.

## What is ascending and descending?

We have 5 circles of different diameters.

**Circles of different diameters**

We need to arrange them in the increasing order of their diameters. We are also required to arrange them in decreasing order of their diameters. To do this, we cannot always rely on the perception of the image. For this, we need to learn-